Howard b



(No Model.) Y

H. B. PAYNE. TBLETHERMOMETBR.

No. 490,383. PatentedJan. s1, 1893.

ams PETER@ co. wuoromruo HOWARD B. PAYNE, OF CHICAGO, ILLINOIS, ASSIGNOROF ONE-HALF TO DAVID B. VAN SLYKE, OF SAME PLACE.

TELKETHERMOMETER.

SPECIFICATION forming part of Letters Patent No. 490,883, dated January31, 1893.

Applicationiiled September 22, 1892. Serial No, 446,514. (No model.)

To a/ZZ whom, t may concern/.-

Be it known that I, HOWARD B. PAYNE, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented a new and useful Impro'vement in Electric TemperatureApparatus, of which the following is a specification.

My invention relates to an improvement in the class of devices for usein the regulation of temperature of apartments and inclosures andinvolving, as the generally stated means for the purpose, an electriccircuit containing, in the apartment or inclosure the ternperature ofwhich is to be controlled, an instrument affected by change intemperature to close the circuit and thereby produce the operation ofelectrically actuated mechanism at a distance, such as a valvecontrolling the heat or cold-air supply to the inclosure, or atemperature-indicating device.

More definitely stated, my invention relates, to an improvement in theconstruction of the primary instrument affected as described by changein temperature; when combined for use as a telethermometer with asuitable indicating or valve apparatus in circuit with it; and it alsorelates to the construction and mode of operation of the combinedelectrotelethermometric apparatus.

Referring to the accompanying drawings- Figure l is a view in frontelevation, diagrammatic in its nature, of my improved apparatus; Fig. 2an enlarged broken section taken at the line 2 on Fig. l, viewed in thedirection of the arrow and showing a contactdetail; Fig. 3, a section atthe line 3 on Fig.

4, of an electro-magnet in side elevation, showing by dotted lines thearmature in its normal position; and Fig. I shows the electromagnet andits indicating armature in front elevation.

A is a telethermometer essentially comprising a bar of materials(preferably two metals) differentially affected by temperature, whichthus causes it to bend in one direction under the influence of a rise,and in the opposite direction under that of a fall, in the temperaturesurrounding it; and in order to provide the telethermometric bar, whichis fastened at one end, as indicated at w, (Fig. 1,) to a base B, in alength that will, without taking up too much lineal space, produce, byits bending, a sweep at its free contacting end r adapting it todescribe an arc of adequate length to contain the number and size ofcontacts I desire, I may bend it, as at fu, one bend only being shown,as that is ordinarily sufcient for my purpose, though as many more maybe provided as desired without thereby departing from the spirit of myinvention.

On the base B is a metal contact-bar C forming one terminal of agenerator (battery D) circuit, being connected with one pole of thebattery by a conductor q, represented as normally broken and containinga circuitclosing device, shown in the form of a pushbutton p. Below thecontact-bar C on the base B is ranged a series E of contacts o, each ofwhich is connected byaseparate conductor 0 with an electro-magnet I inan indicator or receiver represented as an annunciator G, and

hereinafter described; and the several mag` nets have a commonconnection, through the medium of a conductor n with the opposite poleof the battery.

The contacting end of the bar A carries, as a desirable, becauseeffective, construction of contact-insuring means, a rod m extendingtoward the contacts C and E and supporting on its free end a slidingcollar Z formed with brackets Z affording journals for a roller lasufficiently wide to extend across the plane of both said contacts andprovided toward its ends with knife-edge disks z' and e" of metal. Aspring Z2, confined against the collar Z, tends to force the disksagainst the adjacent contacts; and the knife-edges tend to preventimperfect contact by corrosion or the accumulation of foreign matter onthem.

The annunciator G involves a peculiar construction of drop. Theannunciator comprises a suitable case H containing electromagnets I, onefor each contact o and provided with a pivotal armature I j ournaled atopposite ends near one edge between the arms of a bracket I2 fastened tothe sides of the heads of the magnet-spools; and from the armature,preferably at its center, extends at a suitable angle (say aright-angle, as shown) an arm K carrying at its extremity a tag K IOO tobear the sign (number) denoting the temperature represented by thecontact o with which the respective magnet I is connected. On thearmature, in the planes of the magnetcores, are metal extensions h, inthe form of arc-shaped strips, which project close to the cores when themagnets are not' energized,or are in their normal condition in the opencircuit, in order that when energized their attracting influence on thearmature will be effective.

The operat-ion is as follows: Supposing the instrument A to be in a room(as a cold-storage room) the temperature of which has to be Watchedperiodically to insure its normal maintenance, and the indicator G andpushbutton attachment p to be in the office, or in the room of theperson in charge of the temperature-control. At any contact o in theseries E thereof at which the bar A bears, its contactdisks z" and t"will close the circuit at the break between the bar C and series E bybridging the break, so that the circuit is normally closed at thesecontacts, but it is normally open at the push-button p, which controlsthe operation of the annunciator. On closing the circuit by pressing thepush-button, the magnet I connected with the particular contact o onwhich the bar A bears will be energized and attract its armatu re' I',thereby turning the latter into the position in which it is representedin Fig. 3, wherein its finger K is raised from the normal dottedposition represented to that of the full line position illustrated, inwhich it presents its proved form of instrument A, be in the form of anannunciator G.

What I claim as new and desire to secure by Letters Patent isl. Anelectric temperature apparatus comprising, in combination With anelectric generator, a contact-bar C connected with one pole of thegenerator, a series of contacts o, a bar formed of materialsdifferentially affected by temperature, fastened at one end and freetowardits opposite end, a spring contact-device on the free end of thebar, and formed with a roller c carrying disks t' and i normallybridging contacts C and o, and an indicator, orthe `like havingelectro-magnets connected with the contacts o and with the opposite poleof the said generator, substantially as and for the purposeset forth.

. 2. An electric temperature apparatus comprising, in combination withan electric generator and its circuit, and a telethermometer havingcontacts, an annunciator G having electro-magnets I each connected witha different contact and all with one pole of the generator and providedwith pivotal armatures I provided With extensions h carrying signs, anda circuit-closer p in the circuit, substantially as and for the purposeset forth.

3. An electric temperature apparatus comprising, in combination with anelectric generator and a telethermometer normally connecting acontact-bar() forming one terminal of the generator with a contact o ina series thereof, an annunciator G, comprising acase H containingelectro-magnets I having pivotal armatures I provided with extensions hand carrying arms K provided with tags K', said magnets being eachconnected With a different contact o and all With the generator,

and a circuit-closer p in the connection of the contact bar C with thegenerator, substantially as and for the purpose set forth.

HOWARD B. PAYNE.

In presence of M. J. FROST, W. W. WILLIAMS.

